--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/glslang/glslang.nim	Wed Dec 14 00:49:35 2022 +0700
@@ -0,0 +1,86 @@
+# required to link the GLSL compiler
+{.passl: "-Lthirdparty/glslang/lib/" .}
+{.passl: "-Lthirdparty/spirv-tools/lib/" .}
+
+{.passl: "-lglslang" .}
+{.passl: "-lglslang-default-resource-limits" .}
+{.passl: "-lHLSL" .}
+{.passl: "-lMachineIndependent" .}
+{.passl: "-lGenericCodeGen" .}
+{.passl: "-lOSDependent" .}
+{.passl: "-lOGLCompiler" .}
+{.passl: "-lSPIRV" .}
+{.passl: "-lSPIRV-Tools-opt" .}
+
+{.passl: "-lSPIRV-Tools" .}
+{.passl: "-lSPIRV-Tools-diff" .}
+{.passl: "-lSPIRV-Tools-fuzz" .}
+{.passl: "-lSPIRV-Tools-link" .}
+{.passl: "-lSPIRV-Tools-lint" .}
+{.passl: "-lSPIRV-Tools-opt" .}
+{.passl: "-lSPIRV-Tools-reduce" .}
+
+{.passl: "-lstdc++" .}
+{.passl: "-lm" .}
+
+import glslang_c_interface
+import glslang_c_shader_types
+
+
+proc compileShaderToSPIRV_Vulkan*(stage: glslang_stage_t , shaderSource: string, fileName: string): seq[uint32] =
+    var input = glslang_input_t(
+        language: GLSLANG_SOURCE_GLSL,
+        stage: stage,
+        client: GLSLANG_CLIENT_VULKAN,
+        client_version: GLSLANG_TARGET_VULKAN_1_2,
+        target_language: GLSLANG_TARGET_SPV,
+        target_language_version: GLSLANG_TARGET_SPV_1_5,
+        code: shaderSource,
+        default_version: 100,
+        default_profile: GLSLANG_NO_PROFILE,
+        force_default_version_and_profile: false.cint,
+        forward_compatible: false.cint,
+        messages: GLSLANG_MSG_DEFAULT_BIT,
+        resource: glslang_default_resource(),
+    )
+
+    let shader = glslang_shader_create(addr(input))
+
+    if not bool(glslang_shader_preprocess(shader, addr(input))):
+        echo "GLSL preprocessing failed " & fileName
+        echo glslang_shader_get_info_log(shader)
+        echo glslang_shader_get_info_debug_log(shader)
+        echo input.code
+        glslang_shader_delete(shader)
+        return
+
+    if not bool(glslang_shader_parse(shader, addr(input))):
+        echo "GLSL parsing failed " & fileName
+        echo glslang_shader_get_info_log(shader)
+        echo glslang_shader_get_info_debug_log(shader)
+        echo glslang_shader_get_preprocessed_code(shader)
+        glslang_shader_delete(shader)
+        return
+
+    let program: ptr glslang_program_t = glslang_program_create()
+    glslang_program_add_shader(program, shader)
+
+    if not bool(glslang_program_link(program, ord(GLSLANG_MSG_SPV_RULES_BIT) or ord(GLSLANG_MSG_VULKAN_RULES_BIT))):
+        echo "GLSL linking failed " & fileName
+        echo glslang_program_get_info_log(program)
+        echo glslang_program_get_info_debug_log(program)
+        glslang_program_delete(program)
+        glslang_shader_delete(shader)
+        return
+
+    glslang_program_SPIRV_generate(program, stage)
+
+    result = newSeq[uint32](glslang_program_SPIRV_get_size(program))
+    glslang_program_SPIRV_get(program, addr(result[0]))
+
+    var spirv_messages: cstring = glslang_program_SPIRV_get_messages(program)
+    if spirv_messages != nil:
+        echo "(%s) %s\b", fileName, spirv_messages
+
+    glslang_program_delete(program)
+    glslang_shader_delete(shader)